€

19

20

1454192004 Pages:4

A block of mass M; resting on an inclined plane is connected by a string and pulleys (14)
to another block of mass M2 as shown in Fig.7. Find the tension in the string and
acceleration of the blocks. Assume the coefficient of friction between the blocks M;

and the plane to be 0.2. M; =1500N, M2 = 1000N. Angle of inclined plane = 45°.

45°
Fig 7
Module-V

A rotor of an electric motor is uniformly accelerated to a speed of 1800 rpm from rest (14)
for 5 seconds and then immediately power is switched off and the motor decelerates
uniformly. If the total time elapsed from start to stop is 12.5 sec, determine the
number of revolutions made while (a) acceleration (b) deceleration. Also find the

value of deceleration.

A spring stretches by 0.015m when a 1.75kg object is suspended from its end. How (5)
much mass should be attached to the spring so that its frequency of vibration is 3 Hz.

A particle moving with simple harmonic motion has velocities 8m/s and 4m/s when (9)
at the distance of 1m and 2m from the mean position. Determmine (a) amplitude

(b) period (c) maximum velocity, and (d) maximum acceleration of the particle.
വലാ

Page 4 of 4